The spiral is left-sided;This results in less and finer material removal;Enables precise finishing and depth control when machining swirl holes;Made from HSS steel (high-speed steel);Hardened to 65 HRC (Rockwell hardness);Removable handle – can be used with a cordless screwdriver;Handle not included (please order separately under GT460.300);Taper 1:30;Ø 5.5 – 10.0 mm;Cutting length 135 mm;